Server subdomain problem with cloudflare

We run our server on subdomain, but after adding it to cloudflare (A RECORD) the site works but still get some problems.

Server load is slow.

Clodflare diagnostic center say :

The site does not have any DNSSEC records.

The hostname has no DS records.

Direct on server :
A “DKIM” record does not exist for this domain.
A “SPF” record does not exist for this domain.

Best regards.

None of those diagnostics have anything to do with site speed. They’re for DNS and Email, respectively.

The speed is one of many problems.

There are many posts here about speed. But here’s a good place to start:

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Do you see this part

Yes, I saw that. As I said, they do not affect site speed.

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